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Always Sometimes Never for Absolute Value, Opposite, Reciprocal, and Opposite Reciprocal

Monday, we are starting our first unit of Algebra 1 by looking at the definitions of absolute value, opposite, reciprocal, and opposite reciprocal. Last year, I made the mistaken assumption that my 9th graders would be proficient at finding the absolute value of a number/expression when they came in. In addition to absolute value, I’ve decided to address opposites, reciprocals, and opposite reciprocals at the same time. This should save us some time when we get to discussing perpendicular lines!

I decided to create an Always/Sometimes/Never activity to get my students thinking about these terms at a deeper level.

always sometimes never questions over absolute value, opposite, reciprocal, and opposite reciprocal in interactive notebook.

Here’s what I came up with:

screenshot of always sometimes never questions over absolute value, opposite, reciprocal, and opposite reciprocal

I’ve currently got a set of tents in the works for a clothesline activity to go with this lesson.

papers with numbers written on them and colored papers with text "reciprocal," "absolute value," "opposite," and "opposite reciprocal."
plastic clothesline in package.
unwrapped plastic clothesline in bundle.
clothesline hanging on dry erase board in classroom with signs hanging off it with text "reciprocal," "opposite," "opposite reciprocal," and "absolute value."
student placing card on clothesline.
number cards arranged on clothesline.
clothesline with number cards arranged below it.
-9 hanging on clothesline.
-9 and absolute value of -9 on clothesline.
opposite clothespinned to absolute value on number line.

Unknown

Monday 28th of August 2017

I am also curious about this... I have seen lots of ideas for clothesline math, but haven't found any directions as to how it is organized. ??? Thanks for sharing your resources!

Sarah Carter (@mathequalslove)

Tuesday 5th of September 2017

Blog post coming soon :) You can find more about clothesline math here: https://clotheslinemath.com/

Unknown

Sunday 27th of August 2017

I'm curious as how you plan to use the tent cards/clothesline activity?

Sarah Carter (@mathequalslove)

Tuesday 5th of September 2017

Blog post coming soon! :)

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